Roast above ingredients in a[n oil-free] cast iron pan, turning occasionally. Leave husks on tomatillos while you roast ''em. The husks will be nicely blackened, the skins translucent, and the fruits soft when they''re done. [Let me add: the goal is to blacken the skin while doing the least tomatillo-exploding that you can. That way they don''t lose juice into the pan, that burns and smells sometimes. That means moving them around the pan as they roast.]
Put roasted vegetables in food processor with: Salt 1/2 Teaspoon Cilantro 1/4 Cup and process briefly.
Transfer to a pot, and cook the mixture for 5 minutes. [This darkens it up a bit, and mellows the flavors. It tastes too raw otherwise.]